aiohttp 0.14.0

http client/server for asyncio

http client/server for asyncio

Requirements

• Python >= 3.3

• asyncio https://pypi.python.org/pypi/asyncio

License

aiohttp is offered under the Apache 2 license.

Documentation

http://aiohttp.readthedocs.org/

Getting started

Client

To retrieve something from the web:

import aiohttp

def get_body(url):
    response = yield from aiohttp.request('GET', url)
    return (yield from response.read())

You can use the get command like this anywhere in your asyncio powered program:

response = yield from aiohttp.request('GET', 'http://python.org')
body = yield from response.read()
print(body)

If you want to use timeouts for aiohttp client side please use standard asyncio approach:

yield from asyncio.wait_for(request('GET', url), 10)

Server

In aiohttp 0.12 we’ve added highlevel API for web HTTP server.

There is simple usage example:

import asyncio
from aiohttp import web


@asyncio.coroutine
def handle(request):
    name = request.match_info.get('name', "Anonymous")
    text = "Hello, " + name
    return web.Response(body=text.encode('utf-8'))


@asyncio.coroutine
def init(loop):
    app = web.Application(loop=loop)
    app.router.add_route('GET', '/{name}', handle)

    srv = yield from loop.create_server(app.make_handler(),
                                        '127.0.0.1', 8080)
    print("Server started at http://127.0.0.1:8080")
    return srv

loop = asyncio.get_event_loop()
loop.run_until_complete(init(loop))
loop.run_forever()

CHANGES

0.14.0 (Unreleased)

• HttpMessage._add_default_headers does not overwrite existing headers #216

• Expose multidict classes at package level

• add aiohttp.web.WebSocketResponse

• According to RFC 6455 websocket subprotocol preference order is provided by client, not by server

• websocket’s ping and pong accept optional message parameter

• multidict views do not accept getall parameter anymore, it returns the full body anyway.

• multidicts have optional Cython optimization, cythonized version of multidicts is about 5 times faster than pure Python.

• multidict.getall() returns list, not tuple.

• Backward imcompatible change: now there are two mutable multidicts (MultiDict, CIMultiDict) and two immutable multidict proxies (MultiDictProxy and CIMultiDictProxy). Previous edition of multidicts was not a part of public API BTW.

• Router refactoring to push Not Allowed and Not Found in middleware processing

• Convert ConnectionError to aiohttp.DisconnectedError and don’t eat ConnectionError exceptions from web handlers.

• Remove hop headers from Response class, wsgi response still uses hop headers.

• Allow to send raw chunked encoded response.

• Allow to encode output bytes stream into chunked encoding.

• Allow to compress output bytes stream with deflate encoding.

• Server has 75 seconds keepalive timeout now, was non-keepalive by default.

• Application doesn’t accept **kwargs anymore (#243).

• Request is inherited from dict now for making per-request storage to middlewares (#242).

0.13.1 (12-31-2014)

• Add aiohttp.web.StreamResponse.started property #213

• Html escape traceback text in ServerHttpProtocol.handle_error

• Mention handler and middlewares in aiohttp.web.RequestHandler.handle_request on error (#218)

0.13.0 (12-29-2014)

• StreamResponse.charset converts value to lower-case on assigning.

• Chain exceptions when raise ClientRequestError.

• Support custom regexps in route variables #204

• Fixed graceful shutdown, disable keep-alive on connection closing.

• Decode http message with utf-8 encoding, some servers send headers in utf-8 encoding #207

• Support aiohtt.web middlewares #209

• Add ssl_context to TCPConnector #206

0.12.0 (12-12-2014)

• Deep refactoring of aiohttp.web in backward-incompatible manner. Sorry, we have to do this.

• Automatically force aiohttp.web handlers to coroutines in UrlDispatcher.add_route() #186

• Rename Request.POST() function to Request.post()

• Added POST attribute

• Response processing refactoring: constructor does’t accept Request instance anymore.

• Pass application instance to finish callback

• Exceptions refactoring

• Do not unquote query string in aiohttp.web.Request

• Fix concurrent access to payload in RequestHandle.handle_request()

• Add access logging to aiohttp.web

• Gunicorn worker for aiohttp.web

• Removed deprecated AsyncGunicornWorker

• Removed deprecated HttpClient